Solve the Equation $a ^ { 3 } - 5 a ^ { 2 } - 14 a = 0$

Multiple Choice

Solve the equation. $a ^ { 3 } - 5 a ^ { 2 } - 14 a = 0$

A) {2, 7, 0}
B) { $-$ 2, 7, 0}
C) {2, $-$ 7, 0}
D) none of these